couvade couvade couvades Couvelaire Couvelaire uterus couvercle couvert couverts couverture covalence
| covalences covalencies covalency covalent covalent covalently (current term) covalently closed circular DNA covalent bond covalent bond covariance
| covariances covariant covariate covariates covariation covariations covaried covaries covary covarying
|